SBE 318 basic rebuild +CAM , INTAKE, HEADS, expectations?

what you think about decking it with the OEM Flat top pistons?
how much could be done ?

i am dumping the 360 heads and i consider the SM 65cc chamber heads
whit the Whiplash Cam (didnt know about this cam before )
https://www.hughesengines.com/Index/products.php?partid=30170
Keep in mind the 360 heads are around 74 cc's so not much to gain on compression by changing the heads.